#include<iostream>
#include<unistd.h>
using namespace std;

int main()
{
  for(int i = 0;environ[i];i++)
  {
    printf("env[%d],%s",i,environ[i]);
  }
  cout<<"hello c++"<<endl;
  cout<<"hello c++"<<endl;
  cout<<"hello c++"<<endl;
}
